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Chapter 1: Q. 1.70 (page 58)

Add or subtract: ⓐ −5.123 − 18.47 ⓑ37.42 − 50

Short Answer

Expert verified

The result obtained is

ⓐ −23.593

ⓑ −12.58

Step by step solution

01

Step 1. Given information

The given numbers are

ⓐ −4.8 − 11.69

ⓑ 9.58 − 10

We have to add or subtract as applicable.

To add or subtract decimals, we line up the decimal points. By lining up the decimal points this way, we can add or subtract the corresponding place values. We then add or subtract the numbers as if they were whole numbers and then place the decimal point in the sum.

02

Step 2. Solve for part (a) 

⇒−5.123−18.47=−5.123+18.47Now,05.123+18.470¯33.593¯Thus,−5.123−18.47=−33.593

03

Step 3. Solve for part (b) 

⇒37.42−50Thedifferencewillbenegative.Tosubtract,wesubtract37.42from5050.00−37.42¯12.58¯Thus,37.42−50=−12.58

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